MIL-W-28517B(YD)
which have been collected or recovered from solid waste and reprocessed to
become a source of raw materials, as opposed to virgin raw materials. Unless
otherwise specified, none of the above shall be interpreted to mean that the use
of used or rebuilt products are allowed under this specification.
Selection of materials for pump parts. Unless otherwise specified
3.3.1
herein, the selection of materials used in the manufacture of the pump shall be
The manufacturer shall
in accordance with the Hydraulic Institute Standards.
select the materials which shall minimize galvanic corrosion to the greatest
extent possible.
The automatic water supply system shall be
3.4 Design and construction.
size 5, 500 gph minimum at cut-in pressure; class B, 40 psi cut-in, 60 psi
cut-out pressure; style I, reciprocating pump; type a, 25 foot maximum suction
The unit shall be
All lubrication fittings shall conform to MIL-F-3541.
lift.
designed and constructed to withstand the strains, jars, vibrations, and other
conditions associated with shipping, storage, and installation; and shall be
complete so that when installed, it can be used for any operation for its
The unit and accessories shall be designed and constructed to
intended purpose.
prevent conditions hazardous to personnel or deleterious to equipment and shall
permit easy and ready accessibility for replacement of accessories, maintenance,
service, and adjustments.
The pump furnished with the unit shall be of the power
3.4.1 Pump.
reciprocating type, designed and constructed in accordance with the Hydraulic
The pump shall be self-priming after initial priming.
Institute Standards.
Liquid end assembly shall be either the valve
3.4.1.1 Liquid end assembly.
The liquid cylinder shall be of
plate or the side pot type configuration
Cylinder
close-grained cast iron, lined with bronze or brass renewable liners.
Valve assembly shall be of the disk or wing
heads or covers shall be flanged.
type and shall be constructed of rubber, bronze, or corrosion-resistant steel,
The valves shall operate with minimum lost motion or
as specified (see 6.2).
chatter and shall not become permanently distorted when subjected to full
Piston shall be of the cup
pressure load. Valve seats shall be replaceable.
type; brass castings inside and brass plates outside the cup leathers shall hold
Bearings may be roller or sleeve-type, as applicable to
the leathers in shape.
design requirements.
The power end shall be of the horizontal plunger power
3.4.1.2 lower end.
Unless otherwise specified (see 6.2), the reciprocating pump shall be
type.
V-belt driven through a pulley functioning as a flywheel.
A pressure relief valve sized to discharge the
3.4.1.3 Relief valve.
full-rated water flow of the pump at the selected relied pressure shall be
A pressure relief valve that
installed at the pump discharge or on the tank.
carries the appropriate ASME code symbol stamp will be acceptable.
The system shall be capable of meeting the capacity and
3.5 Performance.
lift requirements without exceeding the continuous horsepower rating of the pump
driver.
4
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